The AquaticLife 48" T5 HO 6 Lamp Fixture w/ Lunar Lights combines 420/460 nm Actinic lamps, a 460/620nm lamp, a 700+ nm (10K daylight) lamp and four 1W Lunar lights in one streamlined unitócontrolled by a built in digital timer. The AquaticLife 48" T5 HO 6 Lamp Fixture is for reef aquariums. Also comes in a freshwater version with lamps with spectral output for freshwater species of aquatic life.